Knock-out means for presses



June 26, 1928. 1,674,925

F. C. SEIDEL KNOCK OUT MEANS FOR PRESSES Patented June 26, 1928.

unites stares FEED O. SEIDEL,

OF TOLEDO, OHIO, ASSIGNOR TO THE TOLEDO MACHINE & TOOL COM- PANY, OF TOLEDO, OHIO, A CORPORATION OF OHIO. I

K N OCILOUT 1VIEANS FOR PRESSES.

Application filed June 8,

This invention relates to presses, but more particularly to ejector mechanism for presses for ejecting the article" from the die upon completion of the work.

Most presses employ an ejector bar having a depending pin or stem which extends into the movable die and when the slide carrying the movable die is being raised, the ejector bar engages an adjustable screw on a sta tionary abutment bar which causes ejectment of the work from the die.

It frequently becomes necessary to adjust the position of the slide relatively to the bed or stationary die, and for this'purpose the pitman joining the slide and crank is made adjustable, the adjusting parts being positioned adjacent the connection between the pitman and slide.

Heretofore, in order to effect this adjustment, it has usually been necessary to remove the abutment bar when the slide is in its lowe1 position to afford access to the length adj usting means of the connecting rod. This is decidedly impractical and ineflicient, because the abutment bar is a heavy cumbersome piece, weighing in the case of large presses, over a hundred pounds, and requires the services of several men as well as taking a considerable amount of time.

Objects of this invention are to overcome the above difficulties; to provide an abutment bar which can be quickly and easily moved out of the way to afford access to the adjusting parts; and to provide in a press the new and improved features of construction hereinafter described.

The invention is shown by way of illustration in the accompanying drawings, in which:

Fig. 1 is a front elevation of the slide and associated parts; Fig. 2 is a vertical sectional elevation on the line 22 of Fig. 1; Fig. 3 is a transverse section on the line 33 of Fig. 1; and, Fig. t is a fragmentary view on an enlarged scale of the mounting for one end of the abutment bar.

The illustrated embodiment of the inven tion comprises a press having a frame provided with uprights 1 and abed 2 to receive the usual stationary die. Formed on opposite sides of the uprights 1 are guide plates or gibs 3, in which a slide or plunger 4 is vertically reciprocable. The slide 4: carries the upper movable die (not shown) as will be readily understood.

1927. Serial No; 197.377.

The slide 4 is operated from a crank (not shown), to which'it is connected by means of a pltman or connecting rod 5. The connecting rod 5 is preferably in two parts, 5" and 5 which are in screw threaded engagement, a collar 6 encircling the part 5 for holding the parts in adjusted position. A desirable connection between the parts of the pitman. 5 is shown in the patent to Adolph Seidel, Number 1,606,814, issued November 16th, 1926, but as this forms no part of the present invention, detail descriptionYis not considered necessary.

The lower end of the part 5 of the connecting rod has suitable connect-ion, in the present instance, ball and socket, with the upper end portion ofthe slide 5 and may be squared at 7 to receive a wrench or other suitable tool to effect the desired longitudinal adj ustment.

Formed in the slide 4 is a vertically elongate slot 8 to receive an ejector bar 9 which has limited movementin the slot. Pins 10 project laterally from opposite sides of" the bar 9 and serve to hold the bar in place Depending from the central portion of the bar 9 is a pin 11, which is adapted to extend into the movable die, for engaging and ejecting the article after the work is completed.

When the slide 4 is raised the ejector bar 9 engages adjustable abutment screws 12 carried by transverse abutment bars 13 and 14, respectively and in this manner the work is forced away from the movable die. It will be understood by those skilled in this art that the sheet of metal upon which work has been performed often sticks or adheres to the movable die, and some means must be provided for ejecting the work after the movable die has been separated from the stationary die. The bar 14: is preferably fixed at its opposite ends to the frame and is bowed outwardly as shown.

Projecting laterally from each guide plate 3 is a pair of vertically spaced brackets 15, and each end of the abutment bar 13 is placed between a pair of such brackets. In each set of brackets 15 are registering open ings 16, and formed in each end of the bar 13 is an opening 17 which registers with the bracket openings 16. Extending through the registering opening-s 16 and 17 are pins 18 having knurled heads 19, and in this manner the bar is securely held in place.

When it is desired to adjust the length the connecting rod 5 with the slide in its lowered position, one of the pins 18 is removed. This leaves one end of the bar 13 pivotally connected to the frame and the other end free to be swung outwardly to enable access to be readily afforded to the squared portion 7. Proper length adjustment of the connecting rod can thereafter be quickly made.

It will be understood that in accordance with my invention the time required for effecting the length adjustment. of the connecting rod is reduced to a minimum, and instead of requiring the services of several men to handle the heavy cumbersome abutment bar, a single man can do the work in an efiicfent manner. Although it hasbeen necessary heretofore, in making the adjustment referred to, to remove entirely the a'biitment bar from the frame, by my improved construction such removal is rendered unnecessary.

Vhile I have shown my invention in one embodiment, it is to be understood that numerous changes in details of construction and arrangement may be effected without departing from the spirit of the invention, especially as defined in the appended claims.

VVhat'I claim as new and desire to se cure by Letters Patent is:

1. In a press, the combination of a frame, a slide r'eciprocable in said frame, a connecting rod for said slide having length-adjust ing means ad'acent said slide, an ejector carried by sai slide for ejecting movement relatively thereto, a transverse bar providing an abutment for said ejector and so arranged as to obstruct access to the lengthadjusting means when the slide is in lowered pos tion, and a CODIIGOlHOD'bGtWGBIl said bar and frame to permit the bar to be swung relatively to the frame for allowing ready access to said length-adjusting means when the slide is in its lowered position. 7

2. In a press, .thecombination of .a frame, a slide reciprocable in said frame, a connectz'ng rod for said slide having lengthadjusting means adjacent said slide, an ejecting element carried by said slide for ejecting movement relatively thereto, brackets projecting from each side of said frame, an abutment element having a' bar with its end-s between said b ga'ckets and providing an abutment for said ejecting element, andpins extending through said brackets and opposite ends' of saidabutment bar whereby one pin or the other may be removed to permit one or the other end of said bar to be swung outwardly from said frame to afford access to said lengthadjusting means when the slide is in its lowered p'osition.

3. In a press, the combination of a frame, a slide reciprocab'le in said frame, a connecting rod for saidslide having length-adjusting means adjacent said slide, an ejecting element carried by said slide for ejecting movement relatively thereto, an abutment element for said ejecting element, and connection between said abutment element and said frame including a hinge joint between one end of said element and frame and detachable joint between the other end of said element and frame, whereby said abutment element may be detached and swung outwardly from the frame when in lowered position to afford-ready access to said lengthdjus ng me ns:

In testimony whereof I have hereunto signed'my name to this specification.

FRED o. SEIDEL. 

